III. Mark the letter A, B, C, or D to indicate the sentence that best combines each pair of sentences given.Câu hỏi Tourism is one of Australia's fastest growing industries. It is a major source of foreign exchange. A. As Australia's fastest growing industry, tourism serves as a major source of foreign exchange. B. Being one of Australia's fastest growing industries, tourism is a major source of foreign exchange. C. Tourism is one of Australia's fastest growing industries, so it is a major source of foreign exchange. D. Tourism is a major source of foreign exchange to be one of Australia's fastest growing industries.